fix: correctly close ws connection in web3-eth-contract integration tests #10092

Job	Run time
Build CJS (18)	1m 36s
Build CJS (18)	1m 36s
Build CJS (20.17.0)	1m 22s
Build CJS (20.17.0)	1m 22s
Build ESM	1m 0s
Build ESM	1m 0s
Build Web	28s
Build Web	28s
End-to-End hardhat:ws (electron)	8m 50s
End-to-End hardhat:ws (electron)	8m 50s
Build Types	52s
Build Types	52s
Integration (ipc)	8m 45s
Integration (ipc)	10m 38s
End-to-End hardhat:ws (chrome)	8m 52s
End-to-End hardhat:ws (chrome)	8m 52s
Integration (ws)	9m 31s
Integration (ws)	9m 31s
Integration hardhat	4m 50s
Integration hardhat	4m 50s
End-to-End hardhat:ws (firefox)	9m 3s
End-to-End hardhat:ws (firefox)	9m 3s
Integration (http)	5m 28s
Integration (http)	5m 28s
Lint	2m 13s
Lint	2m 13s
Benchmark Tests	1m 22s
Benchmark Tests	1m 22s
Unit Tests (18)	3m 59s
Unit Tests (18)	3m 59s
Docs CloudFlare Deploy	6m 25s
Docs CloudFlare Deploy	6m 25s
Unit Tests (20.17.0)	3m 23s
Unit Tests (20.17.0)	3m 23s
	2h 37m 51s

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